基于等式的等间隔GM(1,1)模型比较研究  

Comparison study on equidistant sequence GM(1,1) model based on equation

作　　者：邓永和[1] 

机构地区：[1]丽水学院建筑系,浙江丽水323000

出　　处：《测绘科学》2011年第4期236-237,45,共3页Science of Surveying and Mapping

基　　金：丽水学院重点科研项目(KZ201003)

摘　　要：本文归纳了基于等式的2种等间隔GM(1,1)模型,比较了这2种模型与常规模型的精度,算例显示:当发展系数a较小时,3种模型的后验差比值C和小误差概率P的精度一致;当发展系数较大时,基于等式的模型比常规模型的后验差比值C和小误差概率P的精度高,且基于等式的这2种模型的后验差比值C和小误差概率P精度基本相当。In this paper, two kinds of GM（ 1, 1 ） equidistant sequence model were concluded and compared with the general model. The results show that when a （development coefficient） is less, precision of the c（ratio of inspection difference after computing） and p （probability of small error ） of the three kinds are consistent, and when a（development coefficient） is biggish, precision of the c（ratio of inspection difference after computing） and p（pmbability of small error） of the two kinds based on equation are consistent and better than that of the general model.

关 键 词：等间距系列 GM(1 1) 等式 精度 

分 类 号：P25[天文地球—测绘科学与技术]